AbstractHybrid carbon‐glass fiber composites of novolak epoxy‐based vinyl ester resins have been investigated. The chemical resistance, the thermo‐oxidative stability and the mechanical properties such as tensile strength and tensile modulus, as well as flexural strength and flexural modulus, interlaminar shear strength (ILSS) and impact strength have also been estimated. The combination of glass and carbon fibers in the hybrid turns out to be an excellent mix. These composites have good tensile and flexural properties as well as the good chemical resistance of the carbon fibers and the high impact strength of the glass fibers and also the thermo‐oxidative stability of highly aromatic vinyl ester resins based on novola